Mortising machine



Feb. 23, 1932.

H. T. PARKER MORTISING MACHINE Filed April 12, 1929 4 Sheets-Sheet l Harry 7' Parker Feb. 23, 1932. H. T. PARKER MORTISING MACHINE Filed April 12, 1929 4 Sheets-Sheet 2 lil lllillliii :Jvwmdoz Harryf Parker- I V 7325 attomq Feb. 23,1932 H. T. PARKER 1,846,749

MORTISING MACHINE Filed April 12, 1929 4 Sheets-Sheet 3 Feb. 23, 1932.

H. T. PARKER MOR'IIIVSING MACHINE Filed April 12, 1929 4 Sheets-Sheet 4 Patented Feb. 23, 1932 means tin? or ies.

HARRY T. PARKER, OF OAKLAND, CALIFORNIA, ASSIGNCR TO THE STANLEY WORKS, OF NEW BRITAIN, CONNECTICUT, A CORPORATTON OF CONNECTICUT MORTISING MACHINE The present invention relates to a mortising machine for cutting a slot and a counterbore or recess about the slot. As an instance of a use to which the present invention may be applied, reference may be had to the cutting of inortises in styles for the reception of sash pulleys, such as are disclosed in Patent No. 1,625,640 I to J. H. Dillon granted April 19, 1927.

An aim of the present invention is to provide an improved machinefor this purpose wherein the parts are so arranged and organized that the functions of cutting the slot and counterbore may be simultaneously performed with accuracy, facility and despatch.

A further aim of the invention is to provide an improved machine for cutting mortises which is relatively light and compact; which is readily portable; which, while being sturdy, strong and durable, is of simple construction; which will produce uniform work; which does not require the attention of a skilled workman, which is safe to operate, and with which mortisesmay be quickly and economically made.

Other objects will be in part obvious and in part pointed out more in detail hereine after.

. The invention accordingly consists in the features of construction, combination of elements and arrangement of parts which will be exemplified in the construction hereinafter set forth and the scope of the application of which will be indicated in the appended claims.

In the accompanying drawings, wherein I have shown, for illustrative purposes, one of the many embodiments which the present invention may take:

Figure 1 is a front view of the entire machine;

Fig. 2 is a top plan view thereof;

Fig. 2 is a detail view; I

Fig. 3 is a front view of the tool supporting means, one-half of the assembly being in central longitudinal section;

Fig. 4. is a transverse sectional view therethrough, taken substantially on line 1-4: of Fig. 2; and

Fig. 5 is a perspective view of a portion of a window frame or style having a pair of inortises cut by my'machine;

In order that the following detailed description may be more readily followed, a

brief explanation of the general construction of the machine and a description of the mortises which it is adapted to cut will be given. The machine is adapted to cut, in a pulley style or the like, one or 'moremortises depending upon the number of pulley sashes to be mounted on the style; As it is cusitomary to provide each style with two pulleys, one for the lower sash and one for the upper sash, there is shown, in Fig. 5, a style having two mortises which the machine of the present invention is adapted to cut simultaneously. Each of these mortises has an elongated slot or through opening 0 of such size that the pulley body will lit more or less snugly ther in, and a countersunk surface M about the opening. This countersunk surface corre sponds in shape andsize to the face'or attach ing plate of the pulley. It will be observed that t 1e countersunk surfaces are such as to provide a landor shoulder extending entirely about the slot so that the side edges of the face plate, as well as the end portions thereof,'may

be firmly seated. The machine has a base A adapted to support the work, and a casing B mounted for vertical movement in orderto feed the tools into the work. .Nithin the casing is mounted a carriage adapted to reciprocate in a horizontal plane, and in this carriage are rotatably mounted two sets of tools, each set comprising a center slotting tool-C and a counterboring tool D to each side of the slot ting tool. The tools are carried by two sets of spindles, the spindles of each set being arranged in a vertical plane extending in the direction of reciprocation of the carriage. The arrangement is such that the cut taken by one of thetools D will overlap the cut taken by the other counterboring tool of that set.

Referring now more specifically to the drawings, the base or bed A upon'which the work, such as the pulley style S, is adapted to be supported, may be of any suitable shape and construction but it is here shown as being between the spider 23 and stops 27.

in the form of a generally flat member having, adjacent its rear edge, an upstanding rib or flange 10. For the purpose of properly locating the work transversely with respect to the tools, there may be provided a gauge 11 which comprises a bar or strip having an opening 12 adjacent each end. One end of each of the openings is counterbored as at 13. The gauge is adapted to be positioned on the forward ends of bolts 1a which are threaded into suitable openings in the flange or rib 10. The forward ends 14 of these bolts are reduced in diameter for a length somewhat less than thethickness of the bar or gauge 11. The gauge is positioned upon the bolts by merely slipping the gauge into position. lVhen the gauge is in the position shown in Fig. 4, the counterbores 13 receivethe shoulders on the bolts. In the event, the mortises are to be formed in a style closer to that edge engaging the gauge, the gauge may be given the reverse position shown in Fig. 2

Arising from the rear edge of the base is a pair of standards or posts 20 on which is mounted, for vertical sliding movement, the

casing B which carries the driving connec-v tions for rotating the cutting tools and the mechanism for reciprocating the same laterally. In the present instance, the rear cover plate 21 of the casing is provided with apertured ears 22 through which the posts 20 slidably extend. The numeral 23 designates a spider or clamp slidable on the posts 20 in unison with the casing B. This spider has an openingin which is clamped a suitable power device, which is diagrammatically shown as comprising a vertically disposed electric motor 24located on top of the casing B. The arms of the spider encircle this motor and are clamped thereagainst by a bolt 25. For the purpose of normally holding the casing. together with the toolsand the motor carried thereby, in elevated position, there are provided coiled springs 26 about the posts 20 and The stops 27 are in the form of collars and may be secured in any position of vertical adjustment on the posts by set screws 28. The ears 22 projecting rearwardly from the casing are 3 ada ted to en a e these collars soas to limit upward movement of the casing, as shown most clearly in Fig. 4. The casing is adapted to be moved downwardly by means of a lever 30'when it is desired to feed the tools into the work. This lever, between its ends, is fixed to a rockable rod 31 extending longitudinally through the upper end of the we ing. The rear end of the lever is forked or .arm 32 which is forked similarly to the lever 30 and receives the stud 29 attached to the lefthand collar 27. It will be observed that, when the forward end of the lever 30 is depressed, the lever 30 and the arm 32 turn about the fixed studs 29, so that the casing, together with the parts carried thereby, is moved downwardly, thereby compressing the springs 26. When the lever is released, the

1plate39, and between this plate and the bottom wall 36 is mounted, for reciprocating movement in a horizontal plane, the base 40 of the carriage in which the tool shafts or spindles are rotatably mounted. The front and rear edges of the base 40 have V-grooves so as to cooperate with V-shaped guides 41 which may be adjusted by set screws 42.

The carriage for the tool spindles has the base 40 which carries, at its intermediate portion, a' frame having front and 'rear walls 43 and 4 1, respectively, and-a top wall 45. The bottom plate 39 has an opening 46 for accommodating the. lateral reciprocation of the tools, and the bottom wall 36 of the-casing has an opening 47""for accommodating the carriage frame.

In the present illustrated disclosure, the carriage is shown as supporting two sets of tools spindles. Each set of spindles, as stated,vincludes a. central spindle 50 and a spindle 51 to each side thereof. The two sets of spindles are disposed on opposite sides of a common .driven shaft 52. These lower ends of the spindles. Similarly, carried by each of the shafts 51 is a counterboring tool D of greater diameter than the slotting tool. Each of these tools G and B may be of any suitable construction so long as they will cut into the work when fed axially thereinto and will cut laterally when the tools are laterally reciprocated. In the present instance, each of these tools is shown as having two parallel blades 59 which are sharpened on their outside edges and at their lower ends.

The means for rotating the tool'spindles will now be described. Upon'each tool spindle is a spiral gear 60 which-meshes with a spiral gear 61 provided on the shaft 52.

It will be observed that the carriage, to-

get-her with the tool spindles mounted there on, may be reciprocated without disturbing the driving relation between the shaft 52..and the tool spindles since the spiral gears -60,

when the carriage is reciprocated, will-roll, so to speak, along the shaft 52. The shaft 52 is driven from a vertical shaft 63 having formed thereon aspiral gear 64 meshing with the spiral gear 61. This shaft 63 is located in one corner of the casing andis suitably supported by ball bearings as illustrated. The upper end of this shaft extends through the top wall 85 of the casing and into a gear chamber provided by a cap plate 65 suitably secured to the top o-fthe. casing and having an opening in which the lower end of the casing of the motor 24 is fixed. The upper projecting end of the shaft 6.3 carries a gear 66 which. is driven, through an idler or intermediate gear 67, by a pinion 6S fixed to the lower end of the motor shaft.

The shaft 52 extends longitudinally of the casing through the frame ofthe tool carriage and between the two setsof tool spindles. This shaft is supported for rotary movement by the ball bearings 69 located in suitable openings in the end walls ofthe casing. This shaft has no longitudinal movement.

The manner in which the tool carriage, together with the spindles mounted therein, is reciprocated will nowbe described. In the corner of the casing diagonally opposite that in which the shaft 63 is located, is a vertical shaft 70 having, on its upper end, a gear 71 driven from the motor pinion- 68 through an intermediate gear 72. This shaft has a worm 73 with which meshes a worm wheel T l fixed to a transverse shaft 7 5 journalled in, suitable bearings located in webs V or brackets 76 in the left hand end of the casin casing. Fixed to each end of this shaft is an eccentric which includes a disk 77 and a stud 78 eccentrically carried by the disk.

Carried by the front and rearwalls of the frameof the carriage are aligned studs 79, and these studs are respectively connected to the studs 78 by connecting rods 80. If desired, ball bearings 81 may be interposed between the connecting rods and the'studs 78. It will be observed that there are two connecting rods, one to each side of the tool carriage so that, as the latter is reciprocated, there is no tendency to cant or distort it.

For the purpose of holding the work against movement during the cutting opera tions. there is supported, at each end of the a spring pressed plunger 85 having, at its lower end, a foot 86 of such material that it will not scratch the work when brought there-against. The plungers 85 are mount-ed for vertical movement in brackets 87 which are secured to the end walls of the carriage. It will be observed, particularly from Fig. 8, that these brackets are so formed as to hold the ball bearing units 69 in position in the end walls of the casing. About each of the plunger-s is a spring 88 for resiliently urging the plungers downwardly. In order to limit the downward movement of the casing, a

-wardly' and forcing the plungers 85 against the work so as to. hold the latter against movement. On continued downward movement of thelcasi-ng, the slotting tools first cut into the work and as the carriage is reciprocated, these cutting tools also cut laterally. Just'before the slots are cut through, the counter boring tools are brought into engagement with the work so as to cut the counterbores about the slots. As previously stated,

the tools are so arranged and are reciprocated through such a distance that the cuts taken by the left hand counterboring tools, when the. carriage is moved to the right (referring to Figs. 1 and 3), will overlap the cuts which havebeen taken by the right hand counterboring tools upon movement of the carriage to the left. After the cutting operations have been-performed, the lever'30 is released whereupon thesprings 26 will move the casing to the elevatedposition shown in the drawings. Itwill beobserved that the cutting operations are effected by the mere depression of the lever 30, and the operations are very effectively and accurately carried out.

As many changes could be made in the above construction and many i apparently widely difierent embodiments. of this inver'i tion could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not ina limiting sense. f

It is also to be understood that the language used in the following claims is intended to cover all of the generic and specific features of :theinvention herein described and all statements of the scope of the invention which, as a matter of language, might be tric on said shaft, a connecting rod between said eccentric and carriage, and means for driving said common gear and said shaft. 2. In a mortising machine, a casing, a carriage mounted for reciprocation therein, a plurality of tool spindles journaled in said carriage and spaced apart in the direction of reciprocation thereof,'each of said spindles having a gear, a gear common to-all of said first mentioned gears-and fixed against longitudinal movement within said casing, a shaft journaled in said casing at right angles to the line of reciprocation of said carriage, two eccentrics onsaid shaft, and connecting rods between said eccentrics and the opposite sides of said carriage.

3. In a mortising machine, a casing, a car riage .mounted for reciprocation therein, a plurality of tool spindles journaled in said carriage, the axes of said "spindles being in a single plane and spaced apart in .the direc: tion, in which they are laterally reciprocated, means for rotating said spindles, means for reciprocating said-carriage and the spindles carried thereby, and motor means on said casing for driving said rotating means and said reciprocating means.

4. In a mortising machine, a casing, a carriage mounted for reciprocation therein, a plurality of tool spindles journaled in'said carriage, means within said casing for rotating said spindles, means within the casing for reciprocating said carriage, means for supporting said carriage for feeding movement in the direction of the length of said spindles, and a motor on said casing for driving said rotating means and said reciprocating means.

5. In a mortising machine, a casing, a carriage mounted'therein for reciprocation in a horizontal plane, vertical spindles journaled in said carriage and positioned side by side in the direction of reciprocation thereof, a spiral gear journaled in said casing ifixed against longitudinal movement and extendingin the direction of reciprocation of said carriage, gears on said spindles meshing with said spiral gear, a vertical shaft in said casing geared to said spiral gear, a horizontal shaft in said casing at right angles to said spiral gear, an eccentric on each end of-said horizontal shaft, a connecting rod between each eccentric and a side of said carriage, a vertically disposed electric motor mounted upon the top of said casing, gearing between said motor and said vertical shaft, and gearing between said motor and horizontal shaft.

6. In a mortising machine, a holder or cas ing mounted for vertical sliding movement, a tool support mounted in said casing for lateral reciprocation, a plurality of vertical tool spindles journaled in said tool support and positioned side by side in the direction or reciprocation thereof, means for reciprocating said support, means for rotating said work spindles, and manually operable means for moving said casing downwardly to feed the tools into the work.

7. In a mortising machine, a base adapted to support the work to be operated upon,

posts arising from said base, a caslng mounted for vertical movement on said posts,

a carriage mounted in said casing for lateral reciprocating movement, aplurality-of vertical tool spindles j ournaled in said carriage, counterboring and slotting tools on the lower ends of said spindles, means for rotating said spindles, means for reciprocating said car- :riage, a lever journaled on said casing and fulcrumed on one of said posts for depressing said casing, and springs normally tending to raise said casing 8. In a mortising machine, a base adapted to support the work to be operated upon, posts arising fromsaid base, a casing having ears slidably'mounted on said posts, a carriage mounted for reciprocation in said casing, verticalspindles mounted in said tool carriage, slotting and counterboring tools on the lower ends of said spindles, means within said casing for rotating saidspindles, means within said casing for reciprocating said carriage, an electric motor fixed to the topof said casing for-driving said rotating means and reciprocating means, a spider clamped about said motor and slidably mounted on said posts, a stop on one of said posts and against which one of the ears of said casing is adapted to engage to limit upward movement of the casing, a spring about onezof-said posts between said stop and said spider, and a lever pivoted to said casing and .fulcrumed on said stop. 7

9. In a inortising machine, a casing, a carriage mountedtherein for reciprocation, a plurality of tool spindles journaled insaid carriage-and positionedside by side in the direction in which said carriage is recipr-' tween said instrumentality and said common gear, and a driving connection between said instrumcntallty and said element.

10. In a mortising machine, a base, a casing movable towards and away from said base, acarriage mounted for reciprocation in said casing, routing tools journaled in said carriage, said base being adapted to receive and support work to be operated upon by said tools, spring pressed means carried by said casing for clamping the Work to the base and effective incident to movement of the casing towards said base, and means for moving the casing towards said base.

11. In a mortising machine, a base adapted to support the work to be operated upon, guides upstanding from said base, a casing mounted on said guides for vertical movement, a carriage in said casing, routing tools carried by said carriage, means for recipro- 1 eating said carriage to laterally move said. tools, manually operable means for moving the casing towards the base, and a pair of spring-backed plungers carried by said casing and adapted to engage and clamp the work when the casing is moved towards the base.

HARRY T. PARKER. 

